Thyroid gland
Other carcinoma
WDT-UMP / Well differentiated neoplasm of uncertain malignant potential



Topic Completed: 1 January 2017

Revised: 18 March 2019

Copyright: 2003-2018, PathologyOutlines.com, Inc.

PubMed Search: well differentiated neoplasm of uncertain malignant potential OR WDT-UMP


Shuanzeng Wei, M.D., Ph.D.
Page views in 2018: 3,145
Page views in 2019 to date: 2,936
Cite this page: Wei S. WDT-UMP / Well differentiated neoplasm of uncertain malignant potential. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/thyroidwelldiffump.html. Accessed October 21st, 2019.
Definition / general
Essential features
  • Follicular neoplasm with equivocal nuclear features of papillary thyroid carcinoma and questionable capsular or vascular invasion
Prognostic factors
  • Excellent prognosis with lobectomy
Gross description
  • Well circumscribed or encapsulated solid nodule
Microscopic (histologic) description
  • Well circumscribed or encapsulated follicular neoplasm with equivocal nuclear features of papillary thyroid carcinoma and questionable capsular or vascular invasion
Microscopic (histologic) images

Images hosted on PathOut server:

Contributed by Shuanzeng Wei, M.D., Ph.D.


Images hosted on other servers:

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Schematic drawing for capsular invasion (left) and vascular invasion (right)

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Equivocal nuclear
features of papillary
thyroid carcinoma

Cytology description
Cytology images

Images hosted on other servers:

Cytological features of WDT-UMP

Positive stains
Differential diagnosis
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